Enamel is hardest substance in the human body.
61
By weight, Bone is five times stronger than steel.
417
During menstruation, the sensitivity of a woman's middle finger is reduced.
47
A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
6
A person can live without food for about a month, but only about a week without water.
156
The skin on your lips is 200 times more sensitive than your fingertips.
345
During a typical human life span, the human heart will beat approximately 2.5 billion times.
21
Chewing gum boosts your brain power.
285